The D6 road sign, officially 'Via reservada a veículos de transporte público', is a mandatory sign in Portugal indicating that the road or lane ahead is strictly for public transport vehicles. This includes regular passenger buses, taxis, priority vehicles, and police vehicles. As a driver, you must not use this lane or road. Understanding this sign is crucial for navigating Portugal's roads safely and passing your theory test.
Master the meaning of the D6 sign, a mandatory instruction in Portugal indicating a lane exclusively for public transport vehicles. Understanding this sign is vital for theory test revision and safe driving, ensuring compliance with traffic law.
D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) belongs to the Portuguese mandatory signs category in the Regulamento de Sinalização do Trânsito. It normally uses the blue mandatory style, meaning the driver must perform the indicated positive action rather than merely avoid something. The official wording is: via reservada a veículos de transporte público: indicação de que a via está reservada apenas à circulação de veículos de transporte público regular de passageiros, automóveis de praça de letra A ou taxímetro, veículos prioritários e de polícia. It creates a positive duty to follow the indicated route, direction, lane, track, equipment requirement, or road-user rule. For theory preparation, connect the sign to a concrete driving decision: where to look, when to slow, whether to stop or yield, which route or lane to choose, and whether any panel changes the scope of the rule. On the road, interpret it together with markings, traffic lights, police directions, temporary works signs, and any additional panel placed with it. A strong exam answer explains both recognition and behaviour: not only what the sign is called, but what a safe and lawful driver must do next.
D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) means that the driver must understand and apply this official Portuguese instruction: via reservada a veículos de transporte público: indicação de que a via está reservada apenas à circulação de veículos de transporte público regular de passageiros, automóveis de praça de letra A ou taxímetro, veículos prioritários e de polícia. In practical terms, you should position early and follow the indicated direction, route, lane, track, or road-user obligation without improvising a different movement.
Get clear, practical answers to the most common questions about the D6 - D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the Portuguese driving theory exam in Portugal.
The D6 sign means the road or lane is reserved only for public transport vehicles, priority vehicles, and police. You, as a driver of a regular passenger car, are not allowed to use it. It's a mandatory sign requiring you to follow specific instructions.
Only regular public transport vehicles (like buses), taxis (marked with 'A' or a meter), priority vehicles (like ambulances), and police vehicles are permitted to use a road marked with the D6 sign.
Driving on a road designated for public transport by the D6 sign is a violation of traffic rules in Portugal. You should always pay close attention to road signs and markings to avoid entering restricted lanes, which could result in a penalty.
The D6 sign is a mandatory sign, indicated by its blue background and typically a white symbol. It imposes a strict obligation on drivers not to use the road or lane. An information sign, usually rectangular and blue or white, would simply provide details without mandating a specific action or prohibition for general traffic.
Generally, there are no exceptions for regular private vehicle drivers. The sign's purpose is to ensure the smooth operation of public transport. Always look for any additional panels that might modify the sign's application, but typically, you must avoid this lane.
A common mistake is confusing the D6 sign with a general route indication or not understanding it's a prohibition for their vehicle type. Learners might also fail to recognise its mandatory nature and correct behaviour required when encountering it, such as choosing an alternative lane.
A clear reference image of the D6 - D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) road sign used in Portugal.

The D6 - D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) road sign may also be known by these alternative names or terms.
The D6 - D6 - Via reservada a veículos de transporte público (Via reservada a veículos de transporte público) road sign is part of the Mandatory Signs category, which groups together signs with similar rules and functions.
Master Portuguese road signs by comparing related symbols. Understanding subtle differences aids sign recognition and helps avoid confusion during your theory test revision.

D10: You Must Use Your Dipped Headlights (Médios)

D11a: Mandatory Lane for Goods Vehicles Ends Here

D11b: Mandatory Lane for Heavy Vehicles Ends Here

D11c: Mandatory Lane for Motorcycles Has Ended

D12: Fim da via reservada a veículos de transporte público - End of the bus lane ahead!

You've Reached the End of the Mandatory Cycle Path: D13a Sign

D13b: Mandatory Footpath for Pedestrians Ends Here

D13c: The Mandatory Lane for Horse Riders Has Ended
After reviewing the full list, explore signs by specific categories such as warning, regulatory, or informational to deepen your understanding. Practise recognizing signs in context and prepare effectively for your Portuguese driving licence theory test.
All Portuguese Road Signs List